DSH 535 Reduction of clearance and creepage distance

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DSH 535 # ^; R" x8 ]  D; f

Reduction of clearance and creepage distance / j( @" G; _$ u% n4 F* C

54

60601-1(ed.2);am1;am2 " B4 \# U% g& k, G! J6 d

Standard(s)- (year and edition):
8 d8 {6 Y9 x/ m/ |# q8 tIEC 60601-1:1988+A1 +A2
Sub clause(s):
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/ W% D7 r) E5 ?. N3 B: g  ESheet n°: 535
2 w7 q3 Q# W# M6 ]# J! l% RSubject:
Reduction of clearance and
creepage distances
/ R# w7 R- K/ @' h* S" s5 }Key words:
! E: V$ i  G, s" V# HClearance, creepage, reduction,
tracking resistance
Decision taken at the 40th
4 F: |  i- o4 R; ?! u+ _& Pmeeting 2003
" Q  N" h  z2 ?3 hQuestion:
/ j. Y/ J, k' t, |6 Q: HIs it permitted to reduce the creepage and clearance requirements of clause 57.10 based on evidence that
/ X1 o# {- m! P" F, j& Z% ], hthe material being assessed has a high resistivity to tracking?
If it is permitted, what IEC Publication should be used as a guideline in determining the permitted
. s: g+ @  Z6 b" k: qreduced creepage and clearance distances?
* [( _) T8 X5 h$ w: `, V6 J! XDecision:
1 A2 ?/ |8 B2 UThis edition of the standard does not allow reduction in clearance and creepage distance.
0 b0 N% Y/ d5 v( u! ?. X) A$ |( iExplanatory notes:
. a  K9 `4 J: o- f* W/ R2 ]This problem will be transferred to SC62A/WG14 to make a recommendation to the 2nd edition do deal
: x# J" p$ J+ S  e+ Iwith this issue. The 3rd edition will address this issue.

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